<template>
  <div>
      <!-- 面包屑导航区 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片区域 -->
      <el-card>

        <!-- 添加角色按钮区 -->
        <el-row>
          <el-col>
            <el-button type="primary" @click="addRoleDialogVisible = true">添加角色</el-button>
          </el-col>
        </el-row>

        <!-- 角色列表 -->
        <el-table :data="rolesList" border stripe>
          <el-table-column type="expand" >
             <template slot-scope="scope">
                <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['vcenter','bdbottom',i1 === 0 ? 'bdtop' : '']">
                  <!-- 渲染一级权限 -->
                  <el-col :span="5">
                    <el-tag closable @close="removeRightById(scope.row, item1.id)">
                      {{item1.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>

                  <!-- 渲染二级和三级权限 -->
                  <el-col :span="19">
                    <!-- 循环嵌套渲染二级权限 -->
                    <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="['vcenter',i2 === 0 ? '' : 'bdtop']">
                      <!-- 二级权限 -->
                      <el-col :span="6">
                        <el-tag closable type="success" @close="removeRightById(scope.row, item2.id)">
                          {{item2.authName}}
                        </el-tag>
                         <i class="el-icon-caret-right"></i>
                      </el-col>
                      <el-col :span="18">
                        <el-tag closable @close="removeRightById(scope.row, item3.id)" type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" :class="[i3 === 0 ? '' : 'bdtop']">
                          {{item3.authName}}
                        </el-tag>
                      </el-col>
                    </el-row>
                  </el-col>
                </el-row>
             </template>
          </el-table-column>

          <el-table-column type="index" label="#"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)" size="mini">编辑</el-button>
              <el-button type="danger" icon="el-icon-delete" @click="deleteRole(scope.row.id)"  size="mini">删除</el-button>
              <el-button type="warning" icon="el-icon-setting" size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>

      <!-- 添加角色对话框 -->
      <el-dialog title="添加角色"
      :visible.sync="addRoleDialogVisible"
      @close="addDialogClosed"
      width="50%">

        <!-- 内容主体区 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>

        </el-form>

        <span slot="footer" class="dialog-footer">
          <el-button @click="addRoleDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 编辑角色对话框 -->
      <el-dialog title="修改角色"
      :visible.sync="editRoleDialogVisible"
      @close="editDialogClosed"
      width="50%">

        <!-- 内容主体区 -->
        <el-form :model="editForm" :rules="addFormRules" ref="editFormRef" label-width="100px" >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>

        </el-form>

        <span slot="footer" class="dialog-footer">
          <el-button @click="editRoleDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRole">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 分配权限对话框 -->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        @close="setRightDialogClosed"
        width="50%">

        <!-- 树形控件 -->
        <el-tree :data="rightsList" ref="treeRef" :props="treeProps" show-checkbox node-key="id" default-expand-all
        :default-checked-keys="defKeys"
        ></el-tree>

        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>

  </div>
</template>

<script>
export default {
  data () {
    return {
      // 角色列表
      rolesList: [],

      // 添加角色的保存数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },

      // 编辑角色的表单提交数据
      editForm: {
        roleId: '',
        roleName: '',
        roleDesc: ''
      },

      // 控制编辑对话框的显示与隐藏
      editRoleDialogVisible: false,

      // 添加表单的验证规则对象
      addFormRules: {
        roleName: [{
          required: true,
          message: '请输入角色名称',
          trigger: 'blur'
        }, {
          min: 2,
          max: 20,
          message: '角色名称的长度在 2 到 20 个字符',
          trigger: 'blur'
        }],
        roleDesc: [{
          required: true,
          message: '请输入角色描述',
          trigger: 'blur'
        }, {
          min: 10,
          message: '角色描述的长度大于必须10个字符',
          trigger: 'blur'
        }]
      },

      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,

      // 所有权限的数据
      rightsList: [],

      // 树形控件的属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },

      // 默认选中的节点id值数组
      defKeys: [],

      // 当前即将分配权限的角色id
      roleId: '',

      // 控制添加角色对话框的显示与隐藏
      addRoleDialogVisible: false
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
    },
    // 根据id删除对应权限
    async removeRightById (role, rightsId) {
      debugger
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightsId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除角色权限失败!')
      }
      role.children = res.data
    },

    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取用户权限失败!')
      }
      this.rightsList = res.data
      this.roleId = role.id
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },

    // 获取三级权限的id
    getLeafKeys (node, arr) {
      // 如果节点不包含children属性，则为三级权限
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },

    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },

    // 为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()

      ]
      debugger
      console.log(this.roleId)
      const ids = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`,
        { rids: ids })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }

      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    },

    // 添加角色
    async addRole () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败!')
        }

        this.$message.success('添加角色成功!')
        this.addRoleDialogVisible = false
        this.getRolesList()
      })
    },

    // 监听添加角色对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },

    // 点击编辑按钮,显示编辑对话框
    async showEditDialog (id) {
      if (!id) {
        return this.$message.error('获取角色失败!')
      }
      // 获取角色信息
      const { data: res } = await this.$http.get(`roles/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色失败!')
      }
      this.editForm = res.data
      this.editRoleDialogVisible = true
    },

    // 修改角色
    async editRole () {
      const { data: res } = await this.$http.put(
        `roles/${this.editForm.roleId}`, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
      if (res.meta.status !== 200) {
        return this.$message.error('修改角色失败!')
      }
      this.$message.success('修改角色成功!')
      this.getRolesList()
      this.editRoleDialogVisible = false
    },

    // 监听编辑角色对话框关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },

    // 删除角色
    async deleteRole (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      const { data: res } = await this.$http.delete(`roles/${id}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败!')
      }
      this.$message.success('删除角色成功!')
      this.getRolesList()
    }
  }
}
</script>

<style lang="less" scoped>

.el-tag {
  margin: 7px
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
